African Black Duck vs Pink-footed Goose
Anas sparsa 比較対象 Anser brachyrhynchus
Side-by-Side Comparison
| 属性 | African Black Duck | Pink-footed Goose |
|---|---|---|
| 学名 | Anas sparsa | Anser brachyrhynchus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 49.5 cm (19.5 in) | 86.4 cm (34.0 in) |
| 体重 | 996.8333333333334 g (35.16 oz) | 2590.0 g (91.36 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Grazes grasses and aquatic plants near rivers; takes invertebrates in breeding season; nomadic in response … |
| 一腹卵数 | 4-9 | 2-8 |
| Population Trend | — | — |
Habitat Comparison
African Black Duck
Fast-flowing rocky rivers and streams, mountain gorges, and waterfalls from sea level to 4,000 m across sub-Saharan Africa from Ethiopia and Kenya south to the Cape. Requires clear turbulent water with boulders.
Pink-footed Goose
Breeds on tundra and cliff ledges in Greenland, Iceland, and Svalbard. Winters on agricultural fields, saltmarshes, and estuaries in Scotland, England, Netherlands, and Denmark.
Song & Call Comparison
African Black Duck
Produces a harsh, resonant quacking call; alarm is a loud, emphatic quack repeated rapidly. Both sexes call with strong quacking; pairs duet with synchronized calls along African rivers.
Pink-footed Goose
A musical, high-pitched 'wink-wink' — noticeably higher and more musical than Greylag or Bean Goose. The 'wink' call is a reliable identification feature in winter flocks.
Geographic Range & Migration
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
Pink-footed Goose
Breeds on Arctic and sub-Arctic tundra ponds across North America; winters on both US coasts and Gulf Coast estuaries.
保全状況
African Black Duck
Pink-footed Goose
How to Tell Them Apart
African Black Duck
Dark blackish-brown plumage with bold white spots on back and scapulars. Iridescent blue-green speculum with white borders. Head dark with pale spots. Bill and legs dark gray. Sexes similar. Fast-flowing …
Pink-footed Goose
Dark brown head and neck. Back grayish-brown; underparts pale gray. Diagnostic pink feet and pink-banded dark bill. Pale blue-gray forewing in flight. Compact and round-headed. Sexes similar.
About These Birds
African Black Duck
アフリカンブラックダックはサハラ以南のアフリカの急流河川に生息する特殊なカモです。暗褐色の羽毛と白い斑点が特徴で、水流の速い清澄な渓流を好みます。繁殖期には縄張り意識が強く、ペアで生活します。急流の水生昆虫や甲殻類を主食とします。
Pink-footed Goose
ピンクフットグースはグリーンランドとスバールバル諸島に繁殖し、ヨーロッパ北西部で越冬するガンです。ピンク色の脚と短い嘴が特徴的です。農地、湿地、草地に生息し、農作物の落穂や草を採食します。冬季には大群で農地に降りることで農家と軋轢を生じます。